Valve structure.



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COLUMBIA PLANooR/mn Co.. WAS NNNNNNNNNNN C4 S. B., C. E. & W. R. HILL.VALVE STRUCTURE. APPLIOATION FILED SEPT.27,1912.

1 088 34:1 Patented Feb. 24, 1914. 2 SHEETS-HHEET 2.

WM @5 @xm STATES EAENT OFFICE.

STIRLING- B. HILL, CLIMIE E. HILL, ANI) WILLIAM R. HILL, OF SEATTLE,WASHINGTON.

VALVE STRUCTURE.

LSSlU To all whom t may concern.'

Be it known that we, STIRLING B. HILL, CL-rarrn E. HILL, and VILLIAM R.HILL, citizens of the United States, residing at Seattle, in the county'of King and State of lVashington, have invented certain new and usefulImprovements in Valve Structures, of which the following is aspecification.

The present invention relates to valve structures and has particularreference to such devices which are particularly well adapted to be usedin hydraulic rams but not solely restricted to this use.

An important object of the invention is to provide a valve structureembodying a plurality of spaced annular valves to control the passage ofa large volume of water, as is required of valves used in largehydraulic rams.

A further object of the invention is to provide a valve structure of theabove mentioned character, which is automatic and positive in operation,simple in construction, free from undue shocks during operation, wherebyit is durable, and not liable to derangements.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

ln the accompanying` drawings forminga part of this specification and inwhich like numerals are employed to designate like parts throughout thesame, Figure 1 is a plan view of the valve structure, Fig. 2 is asimilar view of the annular valve seats with the annular valves removed,Fig. 3 is a central vertical sectional view through the valve structure,Fig. 3a is a fragmentary inner side view of one of the annular valves,and., Fig. lis a similar view of a slightly modified form of theinvention.

in the drawings wherein for the purpose of illustration, we have shown apreferred embodiment of our invention, the numeral 5 designates aplurality of spaced concentric superposed annular valve seats, which arerigidly connected by an inner frame including legs or ribs G, connectedat their upper ends with a central plate 7. The lowermost annular valveseat 5 is provided with an outwardly extending flange 7, to be supportedor otherwise rigidly attached to a portion of a hydraulic ram or othersupport. The annular valve seats 5 are provided upon their uppersurfaces with annular grooves for receiving packing rings 8,

Specification of Letters Patent.

Application filed September 27, 1912.

Patented Feb. 24, 1914.

Serial No. 722,665.

as shown. All of the annular valve seats 5 except the lowerinost has itslower surface transversely curved, as shown at 9. All of the valve seatsexcept the lowermost are provided with recesses 10, which are mental incross-section, to provide reduced extensions 11.

Rigidly connected with the plate 7 is vertical post or rod 12, uponwhich is mounted to reciprocate a rigid frame 18. including spacedpreferably diametrically arranged legs 14. The legs la are provided withupstanding cylindrical enlargements or sleeves 15, through which aremounted to reciprocate pins or bolts 1G. These bolts have their lowerends rigidly connected with extensions 17, which are preferably castintegral with annular valves 18. Surrounding the upper portions of thebolts 1C are compressible coil springs 19 engaged by washers 20, whichare held in place by adjusting nuts 21, as shown. r1"he annular valves18 are curved in cross-section, as shown, and are provided with fourwebs 22, which engage the extensions 11 of the valve seats 5. These webs22 are preferably cast integral with the annular valve 18 and serve asguides to secure the proper seating of the valves. The annular valves 18descend to engage the packing rings 8 and said annular valves carryrings 23 which engage above the extensions 11. The uppermost guide webs22 slidably engage the periphery of the ring 7, as shown.

Surrounding the post 12 is a coil spring 24, which normally serves tohold the annular valves 18 in their upper or unseated positions. Thevalve structures shown in Figs. l, 2, 8 and t is a waste valve structure0f a hydraulic ram and as is well known, such valve structures areclosed by the water impinging against the normally open valves to seatthem. The water iinpinges against the annular valves 18 and moves themdownwardly into engagementwith their valve seats, in opposition to thespring 2&1. Then the speed of the water is sufficiently decreased thespring 24 will again raise the annular valves. Surrounding the upper endof the post 12 is a cap nut 25, receiving therein a spring 26, whichengages a ring 27. A packing ring 28 is disposed within an annularrecess formed in the lower end of the cap nut 25. The spring 2G servesto stop the upward movement of the frame 13 and takes up the shocks fromthe same. It is obvious that there is a yielding connection between theannular valves 18 and the frame 13, which allows sufficient play toinsure the even seating of each valve ring due to the fact that theimpinging water may move the valve downwardly slightly without movingthe frame 13, but otherwise serves to hold the frame and valve rings inrigid connection.

Attention is called to the fact that the pressure of the water impingingupon the annular valves 18 causes them and the frame 13 to d-escend,while the frame moved by the spring 24E causes the annular valves torise. Means (not shown) are provided for regulating the tension of thespring and thus the capacity of the ram. In place of the helical spring24, a leaf spring may be used to raise the valve structure. This valvemay also be used as a discharge or check valve by removing spring 24 orsubstituting therefor a lighter one of suicient stiffness only tobalance the weight to the valves. In this case the spring 26 receivesthe shock of the opening valves and acting through the frame urges theminto their closed position.

In Fig. 4 we have illustrated a slightly different form of valve, inwhich the valve rings are rigidly connected with the frame. This valvestructure includes spaced superposed annular valve seats 2S and an upperplate 29, which are rigidly connected -by an inner frame includingspaced preferably diamet-rically arranged legs or ribs 30. The valveseats 28 are provided with annular grooves for receiving packing rings31.

The numeral 32 designates annular valves, which are curved incross-section, as shown. These valves are suitably spaced and arerigidly connected with a rigid frame 33 comprising spaced preferablydiametrically arranged legs 34. This connection is afforded by bolts 35or the like. The annular valves 32 engage the packing rings 31 and carryat their upper ends packing rings 36 which extend inwardly to engageport-ions of the valve seats 2S. The frame 33 is mounted to reciprocateupon a vertical post 37 which is rigidly connected with the plate 29.Mounted upon the upper portion of t-he post 37 is a cap nut 38,receiving a spring 39 therein, which spring engages a ring 40, which inturn engages the upper end of the frame 33, to check the upward movementof the frame and absorb the shock of the same. A packing ring l1 isdisposed between the ring 4L() and the cap 38. A spring 42 surrounds thelower portion of the post 36 and engages the frame 33 when the same ismoved downwardly, and is adapted to elevate the frame to unseat thevalves 32. The valves 32 are seated by pressure of the flowing waterwhen the pressure is sufficient to overcome the spring 112 and areunseated by this spring when the pressure is relieved. A leaf spring maybe used in place of the helical spring 42 to unseat the valve. Thisvalve may also be used as a discharge or check valve.

It is to be understood that the forms of our invention herewith shownand described are to be taken as preferred examples of the same, andthat certain changes in the shapes, sizes, and arrangements of parts maybe resorted to wit-hout departing from the spirit of the invention orthe scope of the subjoined claims.

Having thus described our invention, we claim 1. In a valve structure ofthe character described, the combination with a central support, of aplurality of open continuous valve seats surrounding the same, acorresponding number of open continuous valves surrounding the supportand adapted toV engage the valve seats, a frame slidably mounted uponthe central support,.yielding means connecting the valves with t-heframe to allow the same to move slightly in one direction with relationthereto, and yielding means to oppose the movement of the frame in onedirection.

2. In a valve structure of the character described, a plurality ofyspaced annular valve seats, a plurality of spaced annular valves toengage and disengage the valve seats, a movable frame, and boltsconnected with the annular valves and yieldingly connected with theframe.

3. In a valve structure of the character described, a plurality ofspaced annular valve seats, a plurality of spaced annular valves toengage and disengage said valve seats, a r-eciprocatory frame, boltsattached to the annular valves and movably mounted within openingsformed through the frames, and springs surrounding the bolts to opposetheir longitudinal movement in one direction.

In testimony whereof we affix our signatures in presence of twowitnesses.

STIRLING B. HILL. CLIMIE E. HILL. VILLIAIVI R. HILL.

Vit-nesses NEAL C. I-IAwL-nr, R. W. I-IUN'rooN.

Copies of this patent may be obtained for ve cents each. by addressingthe Commissioner of Patents,

Washington, D. C.

